JPH0542636A - Flame resistant heat insulating panel - Google Patents

Abstract

PURPOSE:To provide a lightweight heat insulation panel with excellent flame resistance having a fire-prevention ability of flame retardant secondary level without exerting bad influences on human bodies. CONSTITUTION:When phenol foam consisting of resol-type phenol resin foam- hardens, a flexible surface material is integrally molded by the self-adhesive forces of the phenol foam. The flexible surface material is mixed paper consisting of pulp and glass fiber esterically linked with condensed phosphoric acid. The heat-insulation panel is light-weight and has a fire-prevention ability of flame retardant secondary level without exerting bad influences on human bodies.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating panel having excellent flame resistance.

[0002]

2. Description of the Related Art Rigid synthetic resin foams, especially rigid polyurethane foams, have excellent heat insulating performance and material strength, and heat insulating panels for construction are typical applications thereof. However, since the hard synthetic resin foam has low resistance to fire, it is essential to add a flame retardant.
Polyurethane foam does not provide the fire resistance performance of the second-class flame retardancy specified in JIS shown in Table 1. Polyisocyanurate foam, which has superior fire resistance to polyurethane foam, is combined with a hard surface material such as gypsum board or calcareous board. is doing. On the other hand, a panel in which asbestos paper is combined with phenol foam, which is a hard synthetic resin foam, and which has passed the flame-retardant second-class test has been commercialized.

[0003]

Recently, in the field of construction, there has been a demand for weight reduction and non-combustion of building materials.
Insulation panels are no exception. On the other hand, the adverse effects of asbestos on the human body have been clarified, and asbestos substitutes have been developed. Asbestos paper has also been developed as non-combustible paper. However, a non-combustible paper having the same non-combustible performance as that of asbestos paper has not yet been developed, and polyisocyanurate foam, which is superior in fire resistance to polyurethane foam, has been commercialized as a flame-retardant second-grade building insulation panel. However, a hard surface material such as gypsum board is used on the front surface to provide fireproofing performance, and asbestos paper is compounded on the back surface as a soft surface material. Further, asbestos paper is used as a face material even for a phenol foam having a fire protection performance higher than that of polyisocyanurate foam, and there is a disadvantage that the panel weight is increased and the human body is adversely affected.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides a heat-insulating panel excellent in flame resistance that passes a flame-retardant second-class test without increasing the weight of the panel and without adversely affecting the human body. Is intended to provide
The present invention relates to a flame-resistant heat-insulating panel comprising a synthetic resin foam plate and a mixed paper made of glass fiber and pulp in which condensed phosphoric acid is ester-bonded to the surface of a phenol resin foam.

The phenolic resin foam referred to in the present invention is
Resol-type phenol foam
Foam stabilizer, foaming agent, curing agent and optional
And other additives were added and mixed to form a cream
It is obtained by foaming and curing a material. Used in the present invention
Blended paper, which is a soft surface material used, is condensed into papermaking pulp.
Flame-retardant pulp with acid-ester bond and glass fiber?
It is a mixed paper consisting of The condensed phosphoric acid here is
Urea and phosphoric acid are added together with water as shown in Japanese Patent Publication No. 49-48600.
It is an ammonium polyphosphate solution that is generated by heating.
This becomes the esterifying agent solution, and the cellulose in the pulp
react. The mixing ratio is 70-50% flame retardant pulp,
Lath fiber 30 to 50% is desirable. Ratio of flame-retardant pulp
Is greater than this, the flame resistance is reduced.
As well as the dimensions of the face material when the temperature and humidity change.
Legal stability deteriorates. The proportion of flame-retardant pulp is higher than this
If it is small, it is easy for voids to form in the face material.
The tensile strength is reduced, which is a practical problem. Face material
Basis weight is 100 g / m²~ 300g / m²Is preferred
It Basis weight is 100 g / m²If smaller than on the face material
Phenolic resin for foam molding of phenol foam
Seeps into the surface of the face material. Also, the basis weight is 300g
/ M ²Foam phenolic foam if larger than
When molding, phenol is used due to the heat insulation effect of the face material.
Since it is difficult for heat to reach the inside of the foam,
The curing reaction of the nol foam does not proceed, and the dimensional stability is poor.
Become.

The flame-resistant heat-insulating panel of the present invention is made by mixing a resol-type phenolic resin with a foam stabilizer, a foaming agent, a curing agent, etc., and putting it in a cream form in a formwork on which mixed paper is placed in advance. It is obtained by fixing with an upper lid on which mixed paper is placed in advance, and foaming and curing.

[0007]

EXAMPLES The present invention will be described in more detail with reference to examples.

[0008]

Example 1 A soft face material having a basis weight of 140 g / m ² which was cut into the same size on a stainless steel mold having a length and width of 35 cm (60% flame-retardant pulp in which condensed phosphoric acid was ester-bonded to papermaking pulp) Mixed paper consisting of 40% glass fiber.Sumitomo Steel Sales Co., Ltd. product name GE paper)
The mold is preheated to 70 ° C. in advance, a predetermined amount of a flame retardant, a foam stabilizer, a foaming agent and a curing agent is added to the resol type phenol resin, and the mixture is stirred at high speed for 30 seconds to obtain a creamy mixture. It is poured on top, and through a spacer so as to have a predetermined thickness, the other surface material is a soft surface material (basis weight 140 g / m ² , manufactured by Sumisho Steel Sales Co., Ltd., product name GE
(Paper) is fixed with a stainless steel lid and heated for 10 minutes with a hot press (high-temperature high-pressure molding machine) set at 80 ° C to foam and cure, and after curing, demolded from the mold to both surfaces. A flame-resistant heat-insulating panel in which a soft face material is integrated was obtained.

Regarding the obtained panel, Japanese Industrial Standard,
Table 2 shows the results of the evaluation test on the fire protection performance of the second-class flame retardancy specified in JIS A 1321. The results were judged to be acceptable according to the acceptance criteria shown in Table 1, and the flame-resistant heat-insulating panel obtained according to the present invention had a flame retardance of 2
It can be seen that there is a class-level fireproof performance.

[0010]

[Example 2] A soft surface material on both surfaces was prepared in the same manner as in Example 1 except that the basis weight of the soft surface material (trade name: GE paper, manufactured by Sumisho Steel Sales Co., Ltd.) was 220 g / m ^2. A flame-resistant heat-insulating panel integrated with was obtained. Table 2 shows the results of the fire-retardant performance test of the second-class flame retardancy performed on the obtained panel in the same manner as in Example 1. The fireproof performance of Example 1 or more was shown for each test item, and a pass judgment was obtained.

[0011]

[Comparative Example 1] The same method as in Example 1 was used except that the soft surface material was aluminum hydroxide paper having a basis weight of 160 g / m ² (trade name PF-1 manufactured by Olivebest Co., Ltd.). A flame-resistant heat-insulating panel in which a soft face material is integrated was obtained. When the obtained panel was subjected to a flame retardant class 2 fireproof performance test in the same manner as in Example 1, it failed as shown in Table 2.

[0012]

[Table 1]

[0013]

[Table 2]

[0014]

The flame-resistant heat-insulating panel of the present invention having the above-described structure exhibits the following effects. It is easy to handle because it is lightweight without using hard surface materials such as gypsum board and calcareous board. Asbestos paper is not used for the surface material, so there is no adverse effect on the human body during and after the panel construction. Since it has a flame-retardant second-class fireproof performance, it is not necessary to further subject the surface of the heat insulating material to fireproofing.

Claims (1)

[Claims] 1. A flame-resistant heat-insulating panel, characterized in that a mixed paper made of pulp and glass fiber, in which condensed phosphoric acid is ester-bonded, is integrated on the surface of a phenol resin foam.